Everyone of the clerks ................ punch the time clock.

Each of his assistants ................ the telephone.

Each of the girls ........... the piano.

I wonder why the English .............. on the left hand side of the road.

He .............. the custom was grounded in good sense.

A horse ............. always mounted from the left.

There ................... no rule about the movement of traffic before the Pope came to visit Paris.

Thus a custom ............... born.

There ............. only one place in the whole of England where it ........... legal to drive on the right.

The founders of the American nature ..................... the custom after the Revolution.